MLA
Headquarters at Harrison's Landing. Satirical View of George B. McClellan, Union Army General, Relaxing after Ending the Seven Days Battles by Leading the Army of the Potomac in Stopping the Confederates at Malvern Hill. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP9, Folder 9. https://digital.library.emory.edu/purl/409j3txbd7-cor.
APA, 6th edition
Headquarters at Harrison's Landing. Satirical view of George B. McClellan, Union Army General, relaxing after ending the Seven Days Battles by leading the army of the Potomac in stopping the Confederates at Malvern Hill (OP9, Folder 9). (1862). [Political cartoons]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/409j3txbd7-cor.
Chicago
“Headquarters at Harrison's Landing. Satirical View of George B. McClellan, Union Army General, Relaxing after Ending the Seven Days Battles by Leading the Army of the Potomac in Stopping the Confederates at Malvern Hill.” Political cartoons. Civil War Collection, 1862. OP9, Folder 9. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/409j3txbd7-cor.